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Posted to server-dev@james.apache.org by "Rashid Mahmood (Jira)" <se...@james.apache.org> on 2020/03/04 08:39:00 UTC

[jira] [Created] (JAMES-3086) Mail Server Load Test giving very low throughput

Rashid Mahmood created JAMES-3086:
-------------------------------------

             Summary: Mail Server Load Test giving very low throughput
                 Key: JAMES-3086
                 URL: https://issues.apache.org/jira/browse/JAMES-3086
             Project: James Server
          Issue Type: Bug
          Components: POP3Server, SMTPServer
    Affects Versions: 3.3.0
            Reporter: Rashid Mahmood
         Attachments: image-2020-03-04-09-30-30-054.png, threaddump.txt

After functional tests, we are performing load tests against James Server setup with Casandra/Elasticsearch packaging option. With JMeter constant throughput timer of 300 SMPT requests per seconds we are achieving around 10 requests per seconds. Each Request is with 100KB attachment. Observed CPU of the machine (where MailServer running) was over exhausted.

Many of the threads in thread dump were in awaiting notifications state.

I see around 100 threads from Elastic search, is there any configuration to control this?

Where is the bottleneck? 

!image-2020-03-04-09-30-30-054.png!

 
See the thread dump in attachment.



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